The 5 x 6" Streak 3mm Filter from Tiffen is a special effects filter designed to render a single light ray from a point light source. This filter features a single series of etched lines spaced 3mm apart from each other, which run diagonally across the filter surface. When the filter is rotated, the orientation of the light ray can be adjusted to suit your composition or desired effect. The filter is constructed from clear optical-grade glass for maintained image clarity and measures 5 x 6" / 127 x 152.4mm.